Skip to content

Commit

Permalink
[nll] add regression test for issue rust-lang#27868
Browse files Browse the repository at this point in the history
  • Loading branch information
memoryruins committed Aug 14, 2018
1 parent d5a448b commit e390182
Show file tree
Hide file tree
Showing 2 changed files with 58 additions and 0 deletions.
40 changes: 40 additions & 0 deletions src/test/ui/nll/issue-27868.rs
Original file line number Diff line number Diff line change
@@ -0,0 +1,40 @@
// Copyright 2018 The Rust Project Developers. See the COPYRIGHT
// file at the top-level directory of this distribution and at
// http://rust-lang.org/COPYRIGHT.
//
// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
// option. This file may not be copied, modified, or distributed
// except according to those terms.

// Regression test for issue #27868

#![feature(nll)]

use std::ops::AddAssign;

struct MyVec<T>(Vec<T>);

impl <T> Drop for MyVec<T> {
fn drop(&mut self) {
println!("Being dropped.");
}
}

impl<T> AddAssign<T> for MyVec<T> {
fn add_assign(&mut self, _elem: T) {
println!("In add_assign.");
}
}

fn main() {
let mut vec = MyVec(vec![0]);
let mut vecvec = vec![vec];

vecvec[0] += {
vecvec = vec![];
//~^ ERROR cannot assign to `vecvec` because it is borrowed [E0506]
0
};
}
18 changes: 18 additions & 0 deletions src/test/ui/nll/issue-27868.stderr
Original file line number Diff line number Diff line change
@@ -0,0 +1,18 @@
error[E0506]: cannot assign to `vecvec` because it is borrowed
--> $DIR/issue-27868.rs:36:9
|
LL | vecvec[0] += {
| ------
| |
| _____borrow of `vecvec` occurs here
| |
LL | | vecvec = vec![];
| | ^^^^^^ assignment to borrowed `vecvec` occurs here
LL | | //~^ ERROR cannot assign to `vecvec` because it is borrowed [E0506]
LL | | 0
LL | | };
| |_____- borrow later used here

error: aborting due to previous error

For more information about this error, try `rustc --explain E0506`.

0 comments on commit e390182

Please sign in to comment.